overview: |
  Parent tags are used to expand an external template into the current template,
  with optional parameters delimited by block tags.

  These tags' content MUST be a non-whitespace character sequence NOT containing
  the current closing delimiter; each Parent tag MUST be followed by an End
  Section tag with the same content within the matching parent tag.

  Block tags are used inside of parent tags to assign data onto the context
  stack prior to rendering the parent template. Outside of parent tags, block
  tags are used to indicate where value set in the parent tag should be placed.
  If no value is set then the content in between the block tags, if any, is
  rendered.
tests:
  - name: Default
    desc: Default content should be rendered if the block isn't overridden
    data: { }
    template: |
      {{$title}}Default title{{/title}}
    expected: |
      Default title

  - name: Variable
    desc: Default content renders variables
    data: { bar: 'baz' }
    template: |
      {{$foo}}default {{bar}} content{{/foo}}
    expected: |
      default baz content

  - name: Triple Mustache
    desc: Default content renders triple mustache variables
    data: { bar: '<baz>' }
    template: |
      {{$foo}}default {{{bar}}} content{{/foo}}
    expected: |
      default <baz> content

  - name: Sections
    desc: Default content renders sections
    data: { bar: {baz: 'qux'} }
    template: |
      {{$foo}}default {{#bar}}{{baz}}{{/bar}} content{{/foo}}
    expected: |
      default qux content

  - name: Negative Sections
    desc: Default content renders negative sections
    data: { baz: 'three' }
    template: |
      {{$foo}}default {{^bar}}{{baz}}{{/bar}} content{{/foo}}
    expected: |
      default three content

  - name: Mustache Injection
    desc: Mustache injection in default content
    data: {bar: {baz: '{{qux}}'} }
    template: |
      {{$foo}}default {{#bar}}{{baz}}{{/bar}} content{{/foo}}
    expected: |
      default {{qux}} content

  - name: Inherit
    desc: Default content rendered inside included templates
    data: { }
    template: |
      {{<include}}{{/include}}
    partials:
      include: "{{$foo}}default content{{/foo}}"
    expected: "default content"

  - name: Overridden content
    desc: Overridden content
    data: { }
    template: "{{<super}}{{$title}}sub template title{{/title}}{{/super}}"
    partials:
      super: "...{{$title}}Default title{{/title}}..."
    expected: "...sub template title..."

  - name: Data does not override block
    desc: Provided data does not override data passed into parent
    data: { var: 'var in data' }
    template: "{{<include}}{{$var}}var in template{{/var}}{{/include}}"
    partials:
      include: "{{$var}}var in include{{/var}}"
    expected: "var in template"

  - name: Data does not override block default
    desc: Provided data does not override default value of block
    data: { var: 'var in data' }
    template: "{{<include}}{{/include}}"
    partials:
      include: "{{$var}}var in include{{/var}}"
    expected: "var in include"

  - name: Overridden partial
    desc: Overridden partial
    data: { }
    template: "test {{<partial}}{{$stuff}}override{{/stuff}}{{/partial}}"
    partials:
      partial: "{{$stuff}}...{{/stuff}}"
    expected: "test override"

  - name: Two overridden partials
    desc: Two overridden partials with different content
    data: { }
    template: |
      test {{<partial}}{{$stuff}}override1{{/stuff}}{{/partial}} {{<partial}}{{$stuff}}override2{{/stuff}}{{/partial}}
    partials:
      partial: "|{{$stuff}}...{{/stuff}}{{$default}} default{{/default}}|"
    expected: |
      test |override1 default| |override2 default|

  - name: Override partial with newlines
    desc: Override partial with newlines
    data: { }
    template: "{{<partial}}{{$ballmer}}\npeaked\n\n:(\n{{/ballmer}}{{/partial}}"
    partials:
      partial: "{{$ballmer}}peaking{{/ballmer}}"
    expected: "peaked\n\n:(\n"

  - name: Inherit indentation
    desc: Inherit indentation when overriding a partial
    data: { }
    template: "{{<partial}}{{$nineties}}hammer time{{/nineties}}{{/partial}}"
    partials:
      partial: |
        stop:
          {{$nineties}}collaborate and listen{{/nineties}}
    expected: |
      stop:
        hammer time

  - name: Only one override
    desc: Override one substitution but not the other
    data: { }
    template: "{{<partial}}{{$stuff2}}override two{{/stuff2}}{{/partial}}"
    partials:
      partial: "{{$stuff}}new default one{{/stuff}}, {{$stuff2}}new default two{{/stuff2}}"
    expected: "new default one, override two"

  - name: Super template
    desc: Super templates behave identically to partials when called with no parameters
    data: { }
    template: "{{>include}}|{{<include}}{{/include}}"
    partials:
      include: "{{$foo}}default content{{/foo}}"
    expected: "default content|default content"

  - name: Recursion
    desc: Recursion in inherited templates
    data: {}
    template: "{{<include}}{{$foo}}override{{/foo}}{{/include}}"
    partials:
      include: "{{$foo}}default content{{/foo}} {{$bar}}{{<include2}}{{/include2}}{{/bar}}"
      include2: "{{$foo}}include2 default content{{/foo}} {{<include}}{{$bar}}don't recurse{{/bar}}{{/include}}"
    expected: "override override override don't recurse"

  - name: Multi-level inheritance
    desc: Top-level substitutions take precedence in multi-level inheritance
    data: { }
    template: "{{<parent}}{{$a}}c{{/a}}{{/parent}}"
    partials:
      parent: "{{<older}}{{$a}}p{{/a}}{{/older}}"
      older: "{{<grandParent}}{{$a}}o{{/a}}{{/grandParent}}"
      grandParent: "{{$a}}g{{/a}}"
    expected: c

  - name: Multi-level inheritance, no sub child
    desc: Top-level substitutions take precedence in multi-level inheritance
    data: { }
    template: "{{<parent}}{{/parent}}"
    partials:
      parent: "{{<older}}{{$a}}p{{/a}}{{/older}}"
      older: "{{<grandParent}}{{$a}}o{{/a}}{{/grandParent}}"
      grandParent: "{{$a}}g{{/a}}"
    expected: p

  - name: Text inside super
    desc: Ignores text inside super templates, but does parse $ tags
    data: { }
    template: "{{<include}} asdfasd {{$foo}}hmm{{/foo}} asdfasdfasdf {{/include}}"
    partials:
      include: "{{$foo}}default content{{/foo}}"
    expected:
      hmm

  - name: Text inside super
    desc: Allows text inside a super tag, but ignores it
    data: {}
    template: "{{<include}} asdfasd asdfasdfasdf {{/include}}"
    partials:
      include: "{{$foo}}default content{{/foo}}"
    expected: default content